Here is how i have completed the exercise from the online course on illustration techniques by the painter and illustrator Adolfo Serra:
PRACTICE EXERCISE 1.X
To exercise the gaze there is only one formula … Look
The task: Go out every day and look for what excites me. For example, only take pictures of one-color objects, animals, buildings, sunsets, reflections, etc
As I still have not created my Instagram (shame on meJ) to upload tons of photos, here are some pictures how I completed the task. Actually, many of us are doing this constantly – exercising the gaze, we look, capture and make photos!
How I completed the task:
Green objects in Nature:
Blue objects in cities (current photos and from before):

Something thrown away:
Applause! 🙂
Photos by Dr. A. Palatronis on www.z-antenna.com